isEqual

Determine if two Real vectors are numerically identical

Information

This information is part of the Modelica Standard Library maintained by the Modelica Association.

Syntax

Vectors.isEqual(v1, v2);
Vectors.isEqual(v1, v2, eps=0);

Description

The function call "Vectors.isEqual(v1, v2)" returns true, if the two Real vectors v1 and v2 have the same dimensions and the same elements. Otherwise the function returns false. Two elements e1 and e2 of the two vectors are checked on equality by the test "abs(e1-e2) ≤ eps", where "eps" can be provided as third argument of the function. Default is "eps = 0".

Example

  Real v1[3] = {1, 2, 3};
  Real v2[4] = {1, 2, 3, 4};
  Real v3[3] = {1, 2, 3.0001};
  Boolean result;
algorithm
  result := Vectors.isEqual(v1,v2);     // = false
  result := Vectors.isEqual(v1,v3);     // = false
  result := Vectors.isEqual(v1,v1);     // = true
  result := Vectors.isEqual(v1,v3,0.1); // = true

See also

Vectors.find, Matrices.isEqual, Strings.isEqual

Syntax

result = isEqual(v1, v2, eps)

Inputs (3)

v1

Type: Real[:]

Description: First vector

v2

Type: Real[:]

Description: Second vector (may have different length as v1)

eps

Default Value: 0

Type: Real

Description: Two elements e1 and e2 of the two vectors are identical if abs(e1-e2) <= eps

Outputs (1)

result

Type: Boolean

Description: = true, if vectors have the same length and the same elements